As long as the night was clear you could measure the distance from certain known stars to the northern or southern horizon and get an accurate fix on your latitude.
只要夜空明朗，你可以测量出从某颗已知的星星到北方或者南方的水平线并在纬度上得到准确的方位。
The reasons of the problems in the current bilateral relationship are known to all. France is very clear about the principled position and core concerns of China.
造成中法关系目前局面的原因是众所周知的，法方对中方有关原则立场和核心关切也是清楚的。
The mission and activities of even the most well known organizations are not always clear to the general public.
即便是最知名的组织，广大公众对其使命和活动并非完全了解。
We spend a third of our lives asleep, and it's clear that without it our brains don't function as well, yet little is known about exactly why we do it.
我们每天都要花掉三分之一的时间去睡觉，而且很确定，如果不睡觉，我们的大脑就不能正常工作。但是很少人知道我们为什么会这样。更不知道其中的机理。
It is not clear whether the breeding population around the Zhoushan islands mixes with the one on Mazu. Nor is the birds' wintering range known-possibly the Philippines, Borneo and perhaps Myanmar.
目前舟山群岛和妈祖所有繁殖鸟类的总数还不明确，鸟类过冬的范围也不明确——可能是菲律宾，婆罗洲或者是缅甸。
After all, historical events and people aren't known for being simple, clear-cut or morally unambiguous.
毕竟历史事件和历史人物不是单一、轮廓分明、道德明确的。
“It's very clear that it's a small population, because there are many biologists working in the area, and by now it would have otherwise been a known species,” he said.
“其数量显然不多，因为这一地区有很多生物学家，它们本该早已成为我们所熟知的物种了。” 博士如是说。
Scientists said that it was still not clear why the vaccine, known as RV144 and actually comprising a combination of two previously tested vaccine candidates, had worked.
科学家说他们仍然不清楚为什么由之前两种测试过的候选疫苗组合而成的RV144疫苗能够奏效。
Second, at least one of the genes Yamanaka used was known to trigger cancer, and indeed it soon became clear that mice grown from iPSCs frequently developed tumors.
第二，山中所使用的基因中，至少有一种被认为会诱发癌症，事实也很快证明，由诱导性万能干细胞发育而成的小鼠有极大概率罹患肿瘤。
Vincenti's team is well known for solving mysteries of the art world and he has humbly offered their services to the Louvre to help clear up any doubt.
文森特的研究小组以解开艺术界的谜团而著称，他也已谦卑的提出帮助卢浮宫解开谜团。
Although the final details will not be known until the Baucus and Kennedy bills are unveiled, a few important elements are already clear.
尽管最后细节要等到Baucus和Kennedy的法案公布以后才能揭晓，但是一些重要的元素已经显而易见。
Jiuzhaigou is well known for its beautiful lakes, of which the water is clear and looks colorful.
九寨沟因其美丽的湖泊而闻名。这些湖里的水清澈见底，并看上去五彩斑斓。
While the mechanism for exporting parasite proteins across the parasite membrane has been known for some time, how they get out of the vacuole and into host cells has been less clear.
虽然对疟原虫如何通过寄生膜向外传送寄生蛋白的了解已有一段时间，但通过空泡膜进入宿主细胞的机制还不清楚。
Hillary sent a clear message about her true feelings, saying that her 'personal views' about gay life and marriage 'have been shaped over time by people I have known and loved'.
希拉里将在书中毫不掩饰自己的真实态度，表示通过这么长时间和认识的人以及自己爱的人的相处，自己形成的对同性恋生活和婚姻的看法。
Known in Britain as hen night (for the bride) and stag night (for the groom), it is clear that the royal couple must keep a low profile to avoid giving fodder to the ever-ready paparazzi.
显然，威廉王子和准王妃凯特在举行婚前单身派对时必须保持低调，以免给随时准备出击的狗仔队提供报道素材。
The test result indicated that on the above of known ore- body mercury and silver anomaly were very stable and clear, meanwhile orebody has good relation to that anomaly.
测试结果表明，在已知矿体上方，汞和电吸附中银异常稳定、明显。下覆矿体和异常显示出了很好的对应关系。
Our two peoples are known for their hard work and ingenuity, and it is clear that by working together we can find solutions to our most pressing global challenges.
我们两国人民都以他们的勤奋工作和聪明才智而闻名，显然，通过共同努力，我们能够找到我们最紧迫的全球挑战的解决方法。
Crohn s disease and ulcerative colitis, collectively known as inflammatory bowel disease (IBD), the etiology is not clear, but its pathogenesis has had more understanding.
克罗恩病和溃疡性结肠炎统称为炎症性肠病(IBD)，病因虽不明确，但对其发病机理已有了较多的了解。
It's not completely clear how natural diamonds are formed, and although it is known they are made from carbon, scientists are not sure how carbon gets to the extreme depths at which diamonds are made.
天然的钻石是怎样形成的至今仍不是完全清楚，虽然我们知道钻石是由碳组成，但是科学家仍不能肯定碳是怎样到达钻石形成的这一极端深度的。
Frank has never known anything like it in that corporate area and wanted to make it clear to Dennis in person that he was showing total disrespect to Arsenal.
弗兰克从来没有在包厢里面碰到任何像这样情况，他希望以个人名义明确告诉丹尼斯，他对阿森纳十分不尊重。
This consensus approach will guarantee a year of service that has clear, known goals and the means to achieve them.
赢得了全体一致的同意之后，会确保一年的服务有众所皆知的确定目标，而这也是达成目标的方法。
Today is yours, free and clear, the grandest opportunity you've ever known.
今天是你的，自由清新，这是你所知道的最大的机会。
The use of traditional malt varieties and the well-known Saaz hops gives the beer its clear blonde colour.
这款啤酒的金色源自使用传统麦芽和著名的捷克萨兹啤酒花。
Both UPGMA cluster and PCA analysis showed clear genetic relationships between the 24 mulberry cultivars. The major clusters were related to known pedigree relationships.
UPGMA法聚类和PCA分析都清楚地显示了24个桑树选育品种的亲缘关系，聚类结果与桑树品种的系谱基本一致。
Changes in rainfall patterns and temperatures were known to have an effect, though the reason was not always clear, he said at the launch of the report, the Deadly Dozen.
他在发表名为“12杀手”的报告时说，降雨模式和温度的变化的影响已经为人所知，虽然原因尚不清楚。
Changes in rainfall patterns and temperatures were known to have an effect, though the reason was not always clear, he said at the launch of the report, the Deadly Dozen.
他在发表名为“12杀手”的报告时说，降雨模式和温度的变化的影响已经为人所知，虽然原因尚不清楚。
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